class Circle{
private int r;
public Circle(int r){
this.r=r
}


public int grt(){
return r
}


public double area(){
return Math.P1*getR()*getR()
}


public double circlelength(){
return Math.P1*getR()*2
}


public static void main(String[]args){
Circle circle=new Circle(1);
System.out.println(circle.getR());
System.out.println(circle.area());
Systen.out.println(circle.circlelength())
}
}